Paper bottle



June 29, 1943. w. PELZER ET AL PAPER BOTTLE Filed April 11, 1940 2 Sheets-Sheet 1 INVENTORS Pelzer Har ld H. Fe 2 I TT William June 29, 1943. w. F.'ELZIER HAL 2,323,078

PAPER BOTTLE Filed April 11, 1940 2 Sheets-Sheet 2 v INVENTORS William Pelz er Harold H. Pe zer M @w EY- Patented June 29,

OFFICE I PAPER norm wuum l'eller and amid-n. mm,

New York, N. Y.

Application April 11, 1940, Serial No. 329,052 (cl. era-4.5)

Claims.

Our invention relatesto paper bottles of the type described in our application for patent flled December 19, 1938, Serial No. 256,606, made from paper tubes plaited at one end to form a con-- tracted neck and held by a metal or other neck ring.

We have found in practice that bottles produced by folding a paper tube in a machine to form plaits lack uniformity notwithstanding the use of extra spacing blades on the loop forming members for spacing the loop formations for the plaits, and that pressing the plalts to flatten them throughout their length is not satisfactory.

We have also found that extremely flattened plaits are neither necessarynor desirable, first, because they render the bottle neck less rigid and liable to buckle and'collapse about midway of the length of the plaits when excessive downward pressure is applied to the mouth of the bottle, and especially when placed under the usual filling apparatus there is a tendency of theneck to bend inwardly and collapse; and, second, because the time consumed in subjecting the pla'its to extra heat and pressure to insure the flattened formation reduces the output of themachine and adds considerably to the cost of production.

The object of our invention is to overcome these objections, and this we accomplish by scoring the blanks or sheets from which the bottle tubes are formed to facilitate and producemore accurate and uniform plait formations in the forming machine, and by scoring the blank for upon opposite sides, at the foot of the blank. The upper score is rather wide and deep to form an inwardly projecting circumferential bead against which theshoulder of the flanged bottom is seated to serve as a stop for the bottom during the operation of turning in the body edge over the bottom flange and to obtain a more thorough seal. This deep score also serves when wrapp ng the blank over the tube forming cylinder or horn to form an interlock oi the longitudinal overlapping edges of the blank and insure proper registry of the top and bottom' edges of the blank. The lower score line facilitates the turning in of the bottom edge ofthe tube over the flange of the bottom. This score line is light and insures a uniform overlap and a close fit of the inturned edge into the angle atthe underside of the hotthe plait formations in such manner that when the bottle neck ring is applied and clinched the plaits between the neck ring and shoulderof the bottle will spring outward to form angular sections separated by the single-ply sections of the' neck which act as struts between the neck ring and bottle shoulder to resist bending of the neck inward or outward to a much greater degree than when the plaits are formed so as to renfain flat throughout. This we accomplish by scoring the ,blank in a certain manner as hereinafter described in detail in connection ings.

A further object is to provide a simple method for insuring the proper registering of the overlapp'ng edges of the paper blank in forming the tube; a simple method of seating and securing the bottle bottom in position and to improve the seal; and finally to. provide the finished bottle with an outward flare or taper below the bottom by transforming the bottom edge or chimb into a frustum of a cone. This we accomplish by providing parallel or concentric scorings, preferably with the drawtom, thereby insuring uniform pressure of the bottom shoulder under the seating bead, and a true rim or chimb on which the bottle rests.

In performing the turn-in of the edge of the tube over the bottom flange internal and external pressure is applied to the three-ply rim-in such manner as to expand the three-ply section into a slightly conical form from the seating bead to the bottom edge, which stifl'ens the bottom ring and thereby reduces the liability of the bottom rim being bent or dented inward before or after fllling the bottle and insures that the -bottle will stand straight and steady while passing another angle and showing the body tapered topermit nesting of bottle bodies before applying the bottoms;

Figure 3 is a top plan of the bottles shown in Figures 1 and 2-:

Figures 4 and 5 are plan Views of-the paper blanks employed in producing the bottles of Fig--' urea 1 and 2, respectively;

Figure 6 is an enlarged end view of the mouth of the bottle preparatory to-applying the metal neck ring: I i t Figure 7 is an enlarged cross-section on the line 1-1 of Figures 1 and 2 showingthe angular form of the pla'its at the throat of the bottle; and Figure 8 is an enlarged sectional view showing the application of the bottle bottom.

Referring to the drawings. I indicates the cylindrical bottle body in Figure 1, and 2. indicates the tapering bottle body in Figure 2, the

. latter being indicated as relatively longer to proand shallower than score e and serves to facilitate turning in the part 9 of the body.

longitudinally scored end is caused to fold into plaits 3 having approximately parallel outer edges 4 and converging inner edges 5. The neck plaits are clinched by a metal neck ring 6 which is applied in the manner described in our aplication for atent above referred to. The botp p for the plaits and bottom is similar to that of tom I, Figure 8, has a downwardly extending flange 8 which has a close fit within the body and is secured in position by the intumed body part 9 and an adhesive applied to the inner surface of the tube at the sections 9 and I0, or in I other words from the bead e down to the edge of the tube. v

The blank A for the bottle of Figure 1 is shown I in plan in Figure 4 and is rectangular in shape and provided with longitudinal scorings a and b from opposite sides of the blank for each plait,

: and lateral scorings e and I from opposite sides ofthe sheet for seating and securing the bottom. The scorings 0 shown in heavy lines are on the front or top side of the blank as viewed in Figure 4 and are in the form of ogee curves and provide the fold of the plaits resulting in the converging edges 5. The scorings b are shown in light lines and are on the underside of the blank as viewed in Figure 4 and are approxiplaits.

The section of the blank above the line cforms the approximately cylindrical part of the bottle neck as seen in Figures 1 and 2. The score lines a and b are shown as merging at the shoul- The blank 13 for the bottle of Figure 2 is shown in plan in Figure 5. The top and bottom edges B and 13 form arcs from the same center and the side edges converge in the direction of such center so that when a tapering tube is formed with this blank the circumference will form a true frustum of a cone and the top and bottom edges will lie in parallel planes. The scoring the blank of Figure 4 except that score lines a and b for each plait radiate from the center from which arcs B and B are struck and score lines e and instead of being straight lines parallel to the lower edge of the blank are arcs concentric with are B of the blank.

In preparing the bottle blanks the sheets are cut to size and scored and an adhesive applied along the longitudinal section defined by the dotted line l3 and along the lower end from the bead e to the edge of the blank, both applications being preferably on the same side of the blank, that is, the underside as viewed from Figures 4 and 5, so that when the tube is formed the adhesive for the bottom will be on the inside of the tube. This adhesive preferably is of the plastic heat sealing type. If a wet adhesive is employed it is applied to the longitudinal section defined by line l3 preparatory to bending the blank around the tube forming cylinder or horn, and the adhesive for the bottom is applied preparatory to inserting the bottom into the tube.

der line d to form the beginning of the plait, but 4 in practice the beginning of these score lines at the shoulder line d may be slightly separated as indicated at the right of Figure 4. Also, preferably, the score line b extends somewhat below the score line a since it has been found that this facilitates the formation of the plaits.

Extending across the lower part ofthe blank are lateral scorings e and I.

The scoring e is preferably a deep widescore made on the upper side of the blank as viewed in Figure 4 and spaced from the lower edge approximately twice the width of the flange U of the bottom I and forms antinwardly projecting bead e when the blank is formed into a tube as seen in Figure 8. The purpose of this head is, first, to provide an interlocking bead for the edges of the blank and insure propel-registry of the top and bottom edges of the blank when placed around a cylinder or horn when forming the tube and cementing the overlapping longitudinal edges of the tube; and, second, to provide a seat for and retain the bottom I in position during the operation of turning in and applying pressure The bottle formation from the scored tube is started on a mandrel by bending the tube neck sections i4 inward upon the mandrel and this bending causes the plait sections l5 to fold inof the bottle in the flattened form as seen in Figure 6 whereupon the plaits due to the osee curved scorings a and the straight edged scorings 1) effect an arc-shaped plait section I! as seen in Figure 2 which causes the flat plait section-3 to spring outward slightly to effect the angular cross-section of the plaits between the neck ring 0 and the shoulder of the bottle approximately as i seen in the enlarged section of Figure '7. These to the intumed body part 9 to evenly compress the three-plyv bottom section 8-9-41 The width of section I is such that when turned in and pressed into contact with bottom flange 8, the edge I I will be pressed into the angle l2 and force the shoulder I under the bead to provide sections composed of the flat plait surfaces I and the arc-shaped plait sections l5 constitute struts between the bottle shoulder and ring 8 which within the tube and is pushed into the tube to seat it against bead e. The section 9 of the tube 1 is then bent inward on the score line I and upward against bottom flange 8 either by laterally moving die-members and an expanding plunger or by means of a pair of pressure rollers, so that edge Ii will project closely into angle I 2 of the bottom and thereby force bottom shoulder 'l' closely into the angle formed by bead e. As the turn-in of tube section 9 is completed heat is .applied to the bottle holder which surrounds the bottom flange I. This score may be narrower 745 end oi. the bottle and closely fits into the bead v a series oi 8-9-10 are expanded under heat and pressure A within the holder and the section l-9lll is caused to assume the slightly tapered i'orm shown in Figure 8. I h

What we claim is: 1. A blank for a bottle of the class described, having a series of longitudinally extending scorings at the upper part, said scorings comprising approximately parallel scores in pairs, between a series of ogee curved scores in pairs adjacent each pair or parallel scores, starting at or near the inner ends 01' the parallel lines and diverging outward to and equally spaced from the parallel lines at the edge of the blank, a deep bead extending laterally across the width of the blank near the bottom, and a scoring extending laterally across the width of the blank near the bottom edge below said spaced therefrom.

2. A blank for a bottle 01' the class described, having a series 01' longitudinally extending scordeep scores and uniformly lngs at the upper part, said scorlngs comprising a series of approximately parallel scores in pairs on one side of the blank, a series of ogee curved scores on the opposite side of the blank in pairs adjacent each pair of parallel scores, starting at or near the inner ends diverging outward to and equally spaced from the parallel lines at the edge of the blank, a deep bead scoring extending laterally across the width of the blank near the bottom and impressed from the same side as said scoring extending laterally across the width of the blank near the bottom edge below said deep score and uniformly spaced therefrom and impressed from the opposite side,

3. A blank for a bottle or the class described, having a series of pairs 01' oppositely disposed longitudinally extending ogee curved scores at the upper part, diverging outward to the edge of the blank, a pair of approximately parallel scores between and extending below and close to the inner ends 0! each pair of ogee curved scores,

01' the parallel lines and ogee curved scores, and a I being so positioned upon the a 3 and equally spaced therefrom at the edge of the blank, a bead score extending laterally across the width of the blank near the bottom and a scoring extending laterally across the width of the blank below said last-mentioned scoring and parallel thereto.

4. A blank for a bottle of the class described having at its upper part a series of oppositely disposed longitudinally extending ogee curved scores, a pair of straight line scores symmetrical- 1y positioned between each of said pairs of ogee curved scores, said pairs of straight line scores blank between the ogee curved scores that their longitudinal axes if extended would intersect at a common point, a 'bead scoring extending laterally across the width 01' the blank near the bottom, and a scoring ex tending laterally across the width of the blank below said bead score and parallel thereto, said lateral scores and also or the blank being curved to coincide with arcs of a circle having said common point as its cen ter, and the lateral edges of saidblank being tapered so that it extended they would intersect also at said common point.

5. A bottle of the class described formed from a prescored blank having groups 01! score lines extending longitudinally at one end or the blank, each group comprising a pair of straight score lines extending to the edge of the blank between a pair 01' oppositely disposed ogee curved score" lines starting at or near the inner ends or the straight score lines and diverging outward to the edge of the blank and equally spaced from the outer ends of the, straight score lines, said blank being formed into a tube and contracted along bottle throat.

HAROLD H. mm.

the top and bottom edges 

